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Liula [17]
2 years ago
6

I need help with science pls​

Chemistry
1 answer:
Vinvika [58]2 years ago
7 0

Answer: i honestly dont know that is like what 9th grade science im only a 6th grader lol

Explanation: none

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For green plant cells, which are the substances that result from photosynthesis that are used in cellular respiration? A. oxygen
strojnjashka [21]

Answer:

B. oxygen and glucose

Explanation:

Oxygen for respiration and glucose for energy utilization

6 0
3 years ago
How is proper science validated?
STatiana [176]

The proper science is validated by Experimentation and Testing .

What is experiment and testing?

Experiment is performed to support or Refuge a hypothesis which is given by someone.

Test is to figure out what we expect and what we have observed.

So , the proper validation of science is Experiment and testing because science is all about hypothesis, discoveries if want to prove them right or wrong we have to perform experiment and test .

to learn more about testing and experiment click here brainly.com/question/28175030

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6 0
1 year ago
Which statement is true for a pure compound<br> but NOT true for a pure element?
amid [387]
A pure compound contains many elements.
5 0
3 years ago
The molecular formula of butane is C4H10. It is obtained from petroleum and is used commonly in LPG (Liquefied Petroleum Gas) cy
seropon [69]

Answer:

See explaination

Explanation:

Please see the attached file for the structural diagram of the molecular formation.

It is detailed and properly presented at the attachment.

8 0
3 years ago
List the following molecules in order from most reducedstate to most oxidizedstate: Formaldehyde (CH2O), Methane (CH4), Carbon D
AleksAgata [21]

Answer:

CH₄ < CH₃OH < CH₂O < HCOOH < CO₂

Explanation:

In order to know the oxidation number of C in these compounds, we will use the rule that states that the sum of the oxidation numbers of the atoms is equal to the charge of the compound, in these cases, zero because these are neutral molecules.

  • H is less electronegative than C, so it acts with the oxidation number +1.
  • O is more electronegative than C, so it acts with the oxidation number -1. When there is a double bond, it acts with the oxidation number -2.

<em>Formaldehyde (CH₂O)</em>

C + 2.H + O = 0

C + 2.(1) + (-2) = 0

C = 0

<em>Methane (CH₄)</em>

C + 4.H = 0

C + 4.(1) = 0

C = -4

<em>Carbon Dioxide (CO₂)</em>

C + 2.(O-double bond) = 0

C + 2.(-2) = 0

C = +4

<em>Formic Acid (HCOOH)</em>

In this case, we will just consider the H atom linked to the C atom.

C + 1.(H) + 1.(O-double bond) + 1.(O-single bond) = 0

C + 1.(1) + 1.(-2) + 1.(-1) = 0

C = 2

<em>Methanol (CH₃OH)</em>

In this case, we will just consider the H  atoms linked to the C atom.

C + 3.(H) + 1.(O-single bond) = 0

C + 3.(1) + 1.(-1) = 0

C = -2

The order from most reduced to most oxidized is:

CH₄ < CH₃OH < CH₂O < HCOOH < CO₂

3 0
3 years ago
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